"I am somewhat surprised at how even the the spread and how few would change."
There's a logic behind that. Everyone tends to like what works. It all works so there is little reason to change from what we started with.
I think I have some of every brand of dies every made, three brands of presses, two brands of powder dispensers, two brands of beam scales (no digital gimmicks on my bench), four brands of bullet molds, four brands of case gages, two brands of tumblers, two brands of case trimmers, etc. and it all works fine for me. Meaning, there's no "set up" on my bench, I haven't been a Kool-Aid drinker for any brand since I started in '65. I buy what I want from the brand that produces it at a price I'm willing to pay.